Method of testing globe-valves



(No Model.)

G. F. HAMMER.

METHOD OF TESTING GLOBE VALVES. No. 315,276. Patented Apr. '7 1885.

tie-Si? zn entor Jzamfi -AQd4 ii M fi 7 UNITED STATES GUSTAV F. HAMMER,OF CINCINNATI, OHIO.

PATENT OFFICE.

METHOD OF TESTING GLOBE-VALVES.

SPECIFICATION forming part of Letters Patent No. 315,276, dated April'7, 1885.

Application filed October 10.1ss4. N0 model.)

To aZZ whom, it may concern:

Be it known that I, GUSTAV F. HAMMER, of Cincinnati, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Methods of Testing Globe-Valves, of which the followingis a specification.

My invention has for its object a convenient method of test whereby thevalve may be kept at normal temperature while under high steam-pressure.

It is well known that a globe or check valve or stop-cock may be tightwhen hotand leak when cold, or may be tight under steam-pressure andleak under water-pressure, and that a valve or cook which is provedtight under cold-water pressure will invariably be tight understeam-pressure.

In order to test a valve under cold-water pressure, either a very highnatural head is required,which is seldom attainable fromcitywater-mains, or a force-pump,with the consequent labor of attendanceand slowness of action, must be employed.

In order to supply a cold-water pressure at high heads, say eighty orone hundred pounds, or more, and apply and remove such pressure quickly,is the object of this invention.

The accompanying drawing represents an elevation of an apparatussuitable for carrying out my invention.

A is a globe-valve; B, a steam-pipe connected with a steam-boiler,usually the steam boiler furnishing power in the factory, (where brassor iron steam-fitters and plumbers goods are manufactured.) b is a stopvalve or cock in steam-pipe B. O is a water-pipe connected with the citymains, or with an elevated tank. 0 is a stop-valve in waterpipe O. D Dis a system of pipes connecting steam-pipe B and water-pipe O with theT-fitting E. d d are respectively an elbow and T in the system of pipesD. E is a T provided in its upper run with a nipple, a, to which thevalve or stopcock to be tested is screwed, and in its lower run with astop cook or valve, F, through which the water is vented after avalve,as A, has been tested.

The operation of the apparatus is as follows;

Pipes B and 0 being connected with the steamboiler and tank previouslymentioned, and a valve or other piece, as A, screwed to nipple a, wateris first admitted through valve 0 to i system of pipes D, andconsequently to T E and nipple a. (Meanwhile cock F is of courseclosed.) Cock or valve 0 is then closed and y cook or valve 1)opened,when steam at boilerpressure-say eighty pounds,or moreenterssystem of pipes D and forces the water previously drawn into pipes Dagainst valve A at same pressure. Directly the valve A has been testedcoo-k or valve 12 is closed and cook F opened, when the contents (waterand steam) of pipes D are vented into any couvenient sewer or tankconnection. The water at normal temperature from pipe 0, first fillingpipes D, prevents the contact of steam with valve A, and maintains thelatter at normal temperature while under steam pressure of eighty ormore pounds.

I do not here claim the apparatus shown and;

described, assneh will constitute the subjectmatter of a separateapplication for Letters Patent.

Having described my invention, what I claim is- The method hereindescribed of testing valves, which consists in forcing a column of

